ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
600 KW 120/208 3 Phase Y protection
by gfretwell. 07/20/17 01:02 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,166 Are you busy
174,551 Re: Forum
166,987 Need opinion
Who's Online Now
0 registered members (), 58 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#77040 - 04/18/01 01:31 AM garage outlets, 18" & h.w.exhaust  Offline
Junior Member
Joined: Apr 2001
Posts: 2
BM, Nev, USA
is there a code requirement to have receptacles 18" above the floor in a residential garage?

is there a code restriction that would not allow a garage gfci protected outlet from supplying a high efficiency hot water heater exhaust fan? i believe the gas supply to the w.h. will shut off automatically if the power is interrupted.

2017 / 2014 NEC & Related Books and Study Guides

#77041 - 04/18/01 08:19 AM Re: garage outlets, 18" & h.w.exhaust  
Bill Addiss  Offline
Joined: Oct 2000
Posts: 3,878

I know of no height requirements for outlets in residential garages. But, the NEC is a minimum and it cannot take every circumstance into account. If you are installing or having outlets installed in a garage it would be a good extra precaution to take. Besides, having outlets at higher levels in a garage are more practical and easier to reach.

As for your second question, I am not familiar with this type of HW Heater. if you think that the fan turning off would cause problems or even be undesirable I would meke sure that it is not on a GFCI protected line. They do trip accidentally sometimes with power surges or storms. For this reason I personally will not put a refrigerator or freezer on a GFCI protected outlet if it can be avoided. Having it trip while you are away on vacation and all the food inside spoiling is something that doesn't have to happen.

[Linked Image]

#77042 - 04/18/01 04:36 PM Re: garage outlets, 18" & h.w.exhaust  
wayne  Offline
Joined: Apr 2001
Posts: 54
There are no code requirement on the height of rec in a garage, However it is more practial to have then higher in a garage are for most people would have a work bench or something to work off of and a rec at least 42" above the floor works great. [Linked Image]

Far as for the second question. There are no code requirement on that either. If memory serves me right, on those types heaters they use an electric ignitors, unlike the older counter partner which used a thermocouplem and a pilot lite. so you would not have gas entering the burner unless called for and if in the case mention the gas would not necessary have to shut off. it just would not lite the burner to get hot untill the power was back on. The gas solenoid vale requires current before opening. I hope this is helful.
[Linked Image]

#77043 - 04/19/01 08:01 AM Re: garage outlets, 18" & h.w.exhaust  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
I believe this may have something to do with potential accumulation of gasoline vapors, which are heavier than air, and would tend to lie low. I can't remember where I first heard this explanation though. And, I thought it was higher than 18".

#77044 - 04/19/01 09:28 AM Re: garage outlets, 18" & h.w.exhaust  Offline
Junior Member
Joined: Apr 2001
Posts: 2
BM, Nev, USA
the 97 UPC, plumbing code, 510.1 says to put ignition sources 18" or more above the floor and includes pilots, burners, and switches.

the 98 IMC, mechanical code, 304.2 says the same thing.

the NEC 210-52(g) on garages doesn't address this issue of vapors in a garage... when i wired in Oregon, it used to be a requirement by an NEC amendment. guess thats where i heard it.

#77045 - 04/19/01 11:38 AM Re: garage outlets, 18" & h.w.exhaust  
Bill Addiss  Offline
Joined: Oct 2000
Posts: 3,878

The NEC does have very specific restrictions and requirements in Commercial garages and similar areas, but not for residential applications. Although it could always be a local amendment.


#77046 - 04/19/01 05:03 PM Re: garage outlets, 18" & h.w.exhaust  
Mike  Offline
Joined: Feb 2001
Posts: 62
Why bury receptacles behind stuff stacked 3 feet or higher? Also, the higher the better for extension cords. Lowers the chances of damaging the cords.

Member Spotlight
Anaheim, CA. USA
Posts: 2,707
Joined: October 2000
Show All Member Profiles 

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.002s) Memory: 0.7856 MB (Peak: 0.9369 MB) Zlib enabled. Server Time: 2017-07-20 18:44:42 UTC